Haapsalu Castle is an architectural gem built in the 13th century, which until the end of the 17th century was the seat of power for local authorities. The museum in the main castle focuses on the history of the castle itself. You can learn about the construction of the castle, the birth of the town of Haapsalu, and the fate of the rulers and locals of the Bishopric of Ösel–Wiek. In order to better understand the life of that time, guests can try out different mechanisms. The passages on the walls offer a wonderful view of the castle and the picturesque town of Haapsalu.